Stay-strip.



ENO. 853,094. PATENTED MAY 7, 190'7..

x s. G. LEITGH.

STAY STRIP.

APPLIOATIQN FILED AUG. 10. 1906.

UNITED s'rA'rEs' PATENT' OFFICE.

SAMUEL GILEITCH, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO CARTER, RICE&'COMPANY, INCORPORATED, A` CORPORATION O MASSACHUSETTS.

No. 853,094. i

In the making of paper boxes in which a stay strip is employed to bindtogether two adj oiningisides of the box,I the strip is usually glued orpasted partly to one cof said adjoining sides and partly to the otherand, therefore, has to' be bent at a right angle in order to lap overonto the two sides. Stay strips of various kinds for this purpose havebeen fmade, but diiiicultylhas been found in bending or folding the staystrip neatly and accurately along a line parallel with its sides whichis necessary in order to make a good piece of work. When the stay stripis put on by machine, it is sometimes the practice to crease the strip'along the intended folding line in ,order to enable it to be accuratelyfolded. Sometimes this is done by means of a creasing device connectedwith the Inachine which applies the stay to the box, that is by runninthe iiat strip over' a creasing device just be ore it reaches the box.Sometimes this has been done by forming a longitudinalvcrease or groovein the face ofthe stay strip. This latter method is somewhatobjectionable as it tends to weaken the stay strip along the foldingline.

One object of the present invention is to l lprovide a stay stripindented in such a way that it will more readily fold along theparticular line desired without creasing it along the folding line or inany other way weakening the strip along fthe said folding line, and atthe same time to increase the flexibility. J

The invention consists essentially in forining in one face of the stripa series of depressions or indented diagonal lines on either side of thesaid intended folding line and slanting in opposite directions from eachother, that is at an angle to each other, the

apexes of the angles formed by the junctions of the oppositely'inclinedindented lines being ina straight line alongwhich vthe strip willreadily fold. l

T he invention will vbe fu'lly understood from the following descriptiontaken in con- S-peccaton of Letters Patent.

Application iled August 10, 1,906. Serial No. 330.062.-

. box.

is preferably wound into a coil 21.

STAY-STRIP.

Patented May '7, 1907.

nectionl with the yaccompanying drawings,

and the novel features are pointed out and clearly defined in the claimsat the close of the specification.

In the drawings,-Figure l is a perspective view of a coil of Stay stripembodying my in- 6o vention, partially uncoiled and showing the gummedface thereof with the diagonal lines of indentations. Fig. 2 is alongitudinal central section of a` piece of the stay strip on anenlarged scale from Fig. 1, the section being taken through the pointsof junction of the two oppositely inclined series of indented lines.Fig. 3 is a perspective view showing theA strip partially applied to thecorner of a a modification in which the diagonal lines cut through theadhesive. -Fig. 5 is another /Referring to the draWings,-1 represents 5the stay strip which, for convenience in use,` The body or backingr 2 ofthe strip is composed of cloth or paper or other suitable material andhas upon one face a coating 3 of adhesive mate- 8o -rlal of suitablecomposition which may be applied in any well known way and dried. Thereis formed in one face of the strip,y preferably in the guinined face, ifthe invention is ,use'd with gunimed stay strip, as shown in 85 Figs. l1and 2, a series of indented. lines 4, 4, on opposite sides of theintended folding line of the strip which, as shown in the drawings, isthe median line lengthwise of the stri ,as

itis usually intended to fold the strip a ong 9o the middle. These linesare formed at an angle with each other and with the intended foldingline, and preferably connect with each other vat their inner ends,forming an angle 5 at the point Ofjunction, the apexes of 95 all ofthese angles being a straight linewhich is the folding line. 'i

The lines 4, 4; may be formed in any way suitable or convenient, eitherby pressure as by-a wheel having wing flanges which are dis- Ico posedin angular relation to each other as the lines to be formed, or by a dieor by cutters which cut through the film of adhesive. If formed bypressure, the indentations might be as shown in Figs. 1 and 2 in which adepression 1 o5 is formed on one side andla correspondin bulge 6 on theoppositelside. If the diagona lines are formed by cutting through thefil-m Fig. 4 is a longitudinal section showing 7o of adhesive, as shown'bylines 7 in iFig. 4,

there would not necessarily be any bulging same time there is noweakening of the strip Y, Y along the said line.

Heretofore in stay strips of this general character, it has been vfoundthat when ernployed to stay both the outside and the inside of thecorner to a box, the stay strip has a tendency to spring out from oneside or the other of the box owing to the fact that the gum does not'setsufficiently quickly. My present invention renders the staystrip'lexible at the point where thebend over the edge of the boxoccurs, so that there is no tendency on the part of the stay strip tobecome displaced or spring out, and it remains fixed in place. Thisfixing of the stay-strip occurs without the necessity of holding thestay strip inposition or very great pressure to be exerted bv thecornerstaying machinewhich appliesvthe stay strip to the box.

The formation of lines which cut or break' through the adhesive film,When the invention is used on gumrnedstay strip, causes the backing tomore readily absorb the moisture, throughout the strip, as these linesextend laterally the entire width of the strip and may be placed atclose intervals. After the strip is applied to the box, it driesquickly.

Nhile it is preferred `to have the diagonal lines of indentations in thegummed face of the strip, they lmight be made in the back face as shownin Fig. 5 and still`come Within the scope of my invention',` although Ido. not consider this as desirable. While I. have shownthe indentationsin the gurnined face of lthe strip in the form of diagonal straightlines, Vit Will be understood that the series of diagonal'lines may bemade from` somewhat curved or irregular lines, all of which have thesamegeneral vdirection as the straight lines, in place of using lines whichare absolutely straight. v

I claim as iny invention:

1. The improved corner stay stripfhavingin one face thereof two seriesof diagonal indented lines at an angle to each other whose proximateends terminate in the intended folding line.

2. A corner stay strip for boxes and the like having upon one face acoating of adhesive substance and having in a face thereof a series ofdiagonal indented lines on each side of the intended folding line, thelines on opposite sides of the intended folding line being at an angleto each other.

3. A corner stay strip for boxes and thev like having upon one face acoating of adhesive substance and having 4in one face thereof a seriesof indented diagonal lines on each side of the intended folding line,the indented lines on opposite sides of the intended folding lineslanting in opposite directions, the inner ends of those on one rside ofthe intended folding line being connected with the inner ends of thoseon the other side of the intended folding line, the apexes ofthe anglesformed by the junctions of the lines in the two series being in astraight line which forms the intended folding line.

4. A corner stay strip for boxes and the like having upon one face acoating of adhesive substance and having in the gummed face thereof aseries of diagonal indented lines on either side of the intended foldingline, the diagonal indented lines on opposite sides of the intendedfolding line being at an angle to each other. A

In testimony whereof I affix my signature, in presence of two witnesses.

SAMUEL G. LEITCH.

Witnesses:

ALICE H. MORRISON, AUNE TARR.

